code: def is_allowed(v):
      if "(" in str(v):
          return False
      if "lambda" in str(v):
          return False
      if "__" in str(v):
          return False
  
      return True
  
file_path: lightwood/lightwood/helpers/templating.py
imports: from typing import Callable
  from collections import deque
  import inspect
  import numpy
  from type_infer.dtype import dtype
label_desc: Use image node_id 1 for calling a global function with example usage: is_allowed(v) and returns: True, False, False, False